Whistling when going backwards (ZF AT8) -> VIDEO

philisme · 02-02-2015, 05:39 AM

Hello,

I've a 2014 M235i with the ZF HP8 automatic transmission.

When going backwards a bit faster than for parking I noticed a whistling coming from the gearbox.
I drove a similar car (2014 M135i AT8) with the same AT, and it has also this whistling when going backwards.

You can hear it on this video (not mine) : https://www.youtube.com/watch?x-yt-t...&v=_z-sdHy4q6s

EDIT : NEW VIDEO HERE : https://www.youtube.com/watch?v=hbPY38aMXsM

I'm pretty sure it's not the normal noise of a going backwards gearbox.
I drove a third car (2012 M135i AT8) and it has also this whistling.

On a French forum dedicated to the One and Two, we are around ten owners complaining about that. Some only hears this whistling after 15.000 km.

One guy on this forum contacted ZF France and they replied :

Quote:

"I come to you pursuant to information that I requested from our support department in Germany for your noise when going backwards.

Cases of damage planetary gears train No. 3 can produce this noise.

No information was given to me on the lifetime of a gearbox experiencing this problem.

We advise you to get closer to BMW for support for this repair.

And then, ZF France contacted his dealership to report this problem to BMW France. And to confirm that ZF will replace the gearbox under warranty.

Do you have this whistling too ?

pazzo · 02-02-2015, 08:15 AM

When I saw the title, I thought this was another wind noise thread!

Like damn, how fast you going backwards?

creepy coupe · 02-02-2015, 10:20 AM

I've owned a M135i and M235i both with auto gearboxes and they both make the same noise. It's the way they are.

335BOY · 02-02-2015, 10:45 AM

Doesnt every transmission in the world make a whining noise when backing up?

creepy coupe · 02-02-2015, 10:54 AM

Quote:

Originally Posted by 335BOY

Doesnt every transmission in the world make a whining noise when backing up?

There is something in what you say 335boy.

philisme · 02-02-2015, 01:19 PM

Yes, I know the noise you are talking about. The normal noise of a car backing up.

But this whistling is different...

LDSM · 02-02-2015, 01:46 PM

Do you have a link to another video of this? I couldn't really hear anything in the first video you posted but I'm interested in seeing if this is an issue

philisme · 02-03-2015, 12:15 PM

Here it is

https://www.youtube.com/watch?v=hbPY38aMXsM

It's my colleague's car.
I have exactly the same noise on mine.

philisme · 04-13-2015, 08:07 AM

Some news :

My dealer already changed a ZF8HP gearbox and mine will be the second one.

On the first car (M135i), they first changed the rear diff. due to a stinky oil

My fuel pump will be replaced too

Cyberdemon · 04-13-2015, 08:58 AM

My F30 and F22 both make this noise when backing up. I drove the car for 45,000 miles with no issues...it's gear whine.

I would be very reluctant to have them tear apart your car over this. The guy putting it back together will probably not do as good of a job as the factory.

Cavpilot2k · 04-13-2015, 12:16 PM

It's the Active Sound system being confused as to what sort of sound backing up makes...

gaijin · 04-13-2015, 12:39 PM

Quote:

Originally Posted by Cavpilot2k

It's the Active Sound system being confused as to what sort of sound backing up makes...

MEBII · 04-13-2015, 03:21 PM

Another possible source could be the regenerative braking system.

philisme · 04-15-2015, 02:54 AM

Nop, it's the gearbox.

My dealer had a similar car (M135i, hatch version of the M235i) with the same noise.

A BMW inspector came and decided to change the rear differential => The whistling was still there.
Then they decided to replace the gearbox => no more more whistling !

nike001 · 04-15-2015, 08:18 AM

Every car I've ever driven made a noise in reverse - It's because of the straight cut gears that nearly every manufacturer does for reverse.

02-02-2015, 08:15 AM	#2
pazzo Second Lieutenant 12 Rep 253 Posts Drives: 2017 X1 Glacier Silver Join Date: Aug 2013 Location: Texas iTrader: (0)	When I saw the title, I thought this was another wind noise thread! Like damn, how fast you going backwards? __________________ Pazzo 2017 F48 xDrive Glacier Silver
	Appreciate 0 Quote

02-02-2015, 10:20 AM	#3
creepy coupe Lieutenant General 1867 Rep 13,043 Posts Drives: BMW M340I G20 Join Date: Aug 2007 Location: UK iTrader: (2) Garage List 2015 BMW 435d [0.00] 2009 335i [0.00]	I've owned a M135i and M235i both with auto gearboxes and they both make the same noise. It's the way they are. __________________ -------------------------------------------------------------- Current car.M240i. Previous.MINI JCW. E92 325i. 435d M235i.M135i. 635d Coupe, E92 M3 manual, E92 M3 DCT Competition Pack. E92 335i, Porsche Cayman S Gen2, 135i Coupe. E92 320d, MK5 R32. MK5 Golf GTi,MK5 Golf GT-TDI,E46 318Ci.
	Appreciate 0 Quote

02-02-2015, 10:45 AM	#4
335BOY Colonel 197 Rep 2,802 Posts Drives: 2017 SQ5 Join Date: Jan 2013 Location: Toronto iTrader: (0)	Doesnt every transmission in the world make a whining noise when backing up?
	Appreciate 0 Quote

02-02-2015, 01:19 PM	#6
philisme Private First Class 54 Rep 112 Posts Drives: BMW 1M Coupe + M2 + 330e Join Date: Aug 2014 Location: Luxembourg iTrader: (0) Garage List 2016 BMW 330e [0.00] 2012 BMW 1M coupe [10.00] 2017 BMW M2 [0.00]	Yes, I know the noise you are talking about. The normal noise of a car backing up. But this whistling is different...
	Appreciate 0 Quote

02-02-2015, 01:46 PM	#7
LDSM Captain 344 Rep 686 Posts Drives: ... Join Date: Jun 2012 Location: ... iTrader: (0)	Do you have a link to another video of this? I couldn't really hear anything in the first video you posted but I'm interested in seeing if this is an issue
	Appreciate 0 Quote

02-03-2015, 12:15 PM	#8
philisme Private First Class 54 Rep 112 Posts Drives: BMW 1M Coupe + M2 + 330e Join Date: Aug 2014 Location: Luxembourg iTrader: (0) Garage List 2016 BMW 330e [0.00] 2012 BMW 1M coupe [10.00] 2017 BMW M2 [0.00]	Here it is https://www.youtube.com/watch?v=hbPY38aMXsM It's my colleague's car. I have exactly the same noise on mine.
	Appreciate 0 Quote

04-13-2015, 08:07 AM	#9
philisme Private First Class 54 Rep 112 Posts Drives: BMW 1M Coupe + M2 + 330e Join Date: Aug 2014 Location: Luxembourg iTrader: (0) Garage List 2016 BMW 330e [0.00] 2012 BMW 1M coupe [10.00] 2017 BMW M2 [0.00]	Some news : My dealer already changed a ZF8HP gearbox and mine will be the second one. On the first car (M135i), they first changed the rear diff. due to a stinky oil My fuel pump will be replaced too
	Appreciate 0 Quote

04-13-2015, 08:58 AM	#10
Cyberdemon Brigadier General 1538 Rep 3,331 Posts Drives: 2020 X5 40i, 2018 M3 Comp Join Date: Jun 2012 Location: Long Island NY iTrader: (3)	My F30 and F22 both make this noise when backing up. I drove the car for 45,000 miles with no issues...it's gear whine. I would be very reluctant to have them tear apart your car over this. The guy putting it back together will probably not do as good of a job as the factory. __________________ Current: '20 X5, '18 M3 ZCP Previous: '11 E90 335i, '11 E90 M3, '16 VW GTI, '15 M235i, '13 335i, '08 TL-S, '00 Corvette
	Appreciate 0 Quote

04-13-2015, 12:16 PM	#11
Cavpilot2k Chief Warrant Officer 1023 Rep 1,638 Posts Drives: like a damn lunatic Join Date: Feb 2012 Location: Boston iTrader: (0)	It's the Active Sound system being confused as to what sort of sound backing up makes... __________________ "Prius" is Latin for Eunuch. "Hrothgar": 2012 135i: 6MT M-Sport, BSM/Blk; Nav, Premium, Convenience, HK Dinan Stage 2 +PPK /// BMW PE /// VRSF CP /// K&N /// Koni Sports /// RSFB Inserts /// MPS4S 225/255 /// Other Stuff
	Appreciate 1 Quote

04-13-2015, 03:21 PM	#13
MEBII Mike Bryan 17 Rep 73 Posts Drives: 2015 M235i Join Date: Oct 2014 Location: United States iTrader: (0) Garage List 2015 BMW M235i [0.00]	Another possible source could be the regenerative braking system.
	Appreciate 0 Quote

04-15-2015, 02:54 AM	#14
philisme Private First Class 54 Rep 112 Posts Drives: BMW 1M Coupe + M2 + 330e Join Date: Aug 2014 Location: Luxembourg iTrader: (0) Garage List 2016 BMW 330e [0.00] 2012 BMW 1M coupe [10.00] 2017 BMW M2 [0.00]	Nop, it's the gearbox. My dealer had a similar car (M135i, hatch version of the M235i) with the same noise. A BMW inspector came and decided to change the rear differential => The whistling was still there. Then they decided to replace the gearbox => no more more whistling !
	Appreciate 0 Quote

04-15-2015, 08:18 AM	#15
nike001 Captain 312 Rep 818 Posts Drives: 2018 718 Cayman Join Date: Apr 2011 Location: US iTrader: (2)	Every car I've ever driven made a noise in reverse - It's because of the straight cut gears that nearly every manufacturer does for reverse.
	Appreciate 0 Quote